Finding the Fourth Proportional to 3,914.32, 5,401.78 and 2,145.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.32 : 5,401.78 = 2,145.94 : x
2. Step 2: Convert to fraction form
   3,914.32/5,401.78 = 2,145.94/x
3. Step 3: Cross multiply
   3,914.32x = 5,401.78 × 2,145.94
4. Step 4: Simplify right side
   3,914.32x = 11,591,895.77
5. Step 5: Solve for x
   x = 11,591,895.77/3,914.32
6. Step 6: Final answer
   x = 2,961.41